Facile synthesis of new <i>N</i>-(aminocycloalkylene)amino acid compounds using chiral triflate esters with <i>N</i>-Boc-aminopyrrolidines and <i>N</i>-Boc-aminopiperidines
作者:Gita Matulevičiūtė、Neringa Kleizienė、Greta Račkauskienė、Vytas Martynaitis、Aurimas Bieliauskas、Urtė Šachlevičiūtė、Rokas Jankauskas、Martynas R. Bartkus、Frank A. Sløk、Algirdas Šačkus
DOI:10.1039/d3ra03060a
日期:——
In this study, we prepared a series of new N-(aminocycloalkylene)amino acid derivatives for use in chiral building blocks. The method was based on the conversion of enantiopure α-hydroxy acid esters into the corresponding chiral triflate esters, which were displaced by a nucleophilic substitution SN2 reaction with aminopyrrolidine and aminopiperidine derivatives, and the inversion of the configuration
在这项研究中,我们制备了一系列新的N- (氨基亚环烷基)氨基酸衍生物,用于手性结构单元。该方法基于将对映体纯α-羟基酸酯转化为相应的手性三氟甲磺酸酯,通过与氨基吡咯烷和氨基哌啶衍生物的亲核取代S N 2 反应进行置换,并反转构型得到甲基2-[ (Boc-氨基)环胺-1-基]链烷酸酯具有良好的收率和高对映体和非对映体纯度。合成的2-[(Boc-氨基)哌啶-1-基]丙酸酯与L-苯丙氨酸乙酯结合得到含有哌啶部分的新手性N -Boc-和N -nosyl-二肽。通过1 H-、13 C- 和15 N-NMR 光谱、高分辨率质谱和 X 射线晶体学分析阐明了结构。